JPH05163008A - Production of raw material powder for carbonaceous material - Google Patents

Abstract

PURPOSE:To obtain raw material powder having a high density and good electric-discharge machinability by finely pulverizing a product satisfied with a specific condition originated from the double bonds of C and O in IR absorption spectrum among the products produced by thermally treating a carbonaceous raw material and having a prescribed volatile content. CONSTITUTION:A carbonaceous raw material is thermally treated into products having a volatile content of 3-20wt.%, an average particle size of 15-20mum and a toluene soluble content of 1-10wt.%. The product satisfied with one or more of four conditions originated from the stretching oscillation of the double bonds of C and O in IR absorption spectrum among the thermal products is finely pulverized. As the four conditions, a ratio between the peak of an IR absorption spectrum originated from C=0 at a place near to 1700cm<-1> based on 1790cm<-1> and 1665cm<-1> and the peak of an IR absorption spectrum originated from C=C at a place near to 1600cm<-1> based on 1665cm<-1> and 1540cm<-1> is set to <=0.25. The changing rate from the carbonaceous raw material to a thermal treatment product in the peak ratio is set to <=4 as the other condition.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は高密度特殊炭素材の原料
粉として有用な原料粉の製造方法に関するものである。
さらに詳しくは高密度でかつ放電加工特性が良い特殊炭
素材用原料粉の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a raw material powder useful as a raw material powder for a high-density special carbon material.
More specifically, it relates to a method for producing a raw material powder for a special carbon material, which has a high density and excellent electric discharge machining characteristics.

【０００２】[0002]

【従来の技術】従来特殊炭素材はピッチコークス又は石
油コークスを所定の割合に粒度配合した粒と粉を加熱、
混合しながらバインダーピッチを適当量添加ねつ合後、
成形して製造される。さらにこの生成形体を焼成、黒鉛
化後、加工して製品である特殊炭素材を製造している。2. Description of the Related Art Conventionally, a special carbon material is a mixture of pitch coke or petroleum coke mixed in a predetermined ratio with particles and powder,
Add an appropriate amount of binder pitch while mixing, and after mixing,
Manufactured by molding. Further, this green body is fired, graphitized, and then processed to produce a special carbon material as a product.

【０００３】また最近ピッチを熱処理後、溶剤で処理し
て得たメソカーボンマイクロビーズを成形して特殊炭素
材を製造する方法も報告されている。Further, recently, a method for producing a special carbon material by molding mesocarbon microbeads obtained by treating a pitch with a solvent after heat treatment has been reported.

【発明が解決しようとする課題】これらの方法は製品の
嵩密度が低い、強度が低い等製品の特性が不十分であ
り、また工程が複雑で製品コストが高い等の課題があ
り、低コストで特性の良い特殊炭素材の出現が望まれて
いた。These methods have problems that the product properties are insufficient such as low bulk density and low strength of the product, and that the process is complicated and the product cost is high. Therefore, the advent of special carbon materials with good characteristics was desired.

【０００４】また近年炭素材は放電加工用電極としての
利用が注目され、需要が急増の傾向にあるが、従来の炭
素材では放電加工特性が不十分であり、もっと放電加工
特性の良い炭素材、特に放電加工時の消耗率が低い炭素
材が要求されている。またメソカーボンから製造した炭
素材では工程が複雑なためにコストが高く、製造コスト
がもっと低くて高特性のものが求められている。In recent years, the use of carbon materials as an electrode for electric discharge machining has attracted attention, and the demand for them is increasing rapidly. However, conventional carbon materials have insufficient electric discharge machining characteristics, and carbon materials with better electric discharge machining characteristics. Particularly, a carbon material having a low wear rate during electric discharge machining is required. In addition, a carbon material manufactured from mesocarbon is expensive because of the complicated process, and it is required to have a low manufacturing cost and high characteristics.

【０００５】[0005]

【課題を解決するための手段】そこで、本発明者らはか
かる状況に鑑み、高強度でかつ放電特性の良い特殊炭素
材を製造すべく鋭意検討した結果、炭素質原料を熱処理
し、ある特性を持つ原料となし、微粉砕して成形後、製
品とすると高特性となることを見出し、本発明に到達し
た。すなわち本発明の要旨は、炭素質原料を熱処理して
得られる熱処理生成物であり、揮発分（ＶＭ）が２０％
以下でかつ３％以上であり、平均粒度が１５〜２０μｍ
におけるトルエン可溶分（ＴＳ）が１０％以下でかつ１
％以上であるもののうち、赤外吸収スペクトルによる炭
素と酸素の二重結合（Ｃ＝Ｏ）に由来するピークが、下
記に示す条件（１）ないし（４）の少なくとも一つを満
足するものを微粉砕することを特徴とする炭素材用原料
粉の製造法にある。Under the circumstances, the inventors of the present invention have made earnest studies to produce a special carbon material having high strength and good discharge characteristics, and as a result, heat-treating a carbonaceous raw material to obtain a certain characteristic. The present invention has been accomplished by discovering that a product having high characteristics can be obtained by forming a product after forming a raw material having the above, finely pulverizing and molding. That is, the gist of the present invention is a heat-treated product obtained by heat-treating a carbonaceous raw material, which has a volatile content (VM) of 20%.
It is less than or equal to 3% and the average particle size is 15-20 μm
Toluene soluble content (TS) in 10% or less and 1
% Or more, the peak derived from the carbon-oxygen double bond (C═O) in the infrared absorption spectrum satisfies at least one of the following conditions (1) to (4): It is a method for producing a raw material powder for a carbon material, which is characterized by finely pulverizing.

【０００６】（１）１７９０ｃｍ−１と１６６５ｃｍ−
１をベースとした１７００ｃｍ−１付近のＣ＝Ｏ二重結
合に由来する赤外吸収スペクトルのピークと１６６５ｃ
ｍ−１と１５４０ｃｍ−１をベースとした１６００ｃｍ
−１付近のＣ＝Ｃ二重結合に由来するピークの比が０．
２５以下である熱処理生成物。(1) 1790 cm-1 and 1665 cm-
1650 c and the peak of the infrared absorption spectrum derived from the C = O double bond near 1700 cm-1 and 1665c
1600 cm based on m-1 and 1540 cm-1
The ratio of the peaks derived from the C = C double bond near -1 is 0.
A heat-treated product that is 25 or less.

【０００７】（２）下記に示す赤外吸収スペクトルの比
における上記熱処理生成物と該炭素質原料の比が、すな
わち炭素質原料から熱処理生成物への変化率が４．０以
下である熱処理生成物。(2) Heat treatment product having a ratio of the heat treatment product and the carbonaceous raw material in the ratio of infrared absorption spectrum shown below, that is, a rate of change from the carbonaceous raw material to the heat treatment product is 4.0 or less. object.

【０００８】記；１７９０ｃｍ−１と１６６５ｃｍ−１
をベースとした１７００ｃｍ−１付近のＣ＝Ｏ二重結合
に由来する赤外吸収スペクトルのピークと１６６５ｃｍ
−１と１５４０ｃｍ−１をベースとした１６００ｃｍ−
１付近のＣ＝Ｃ二重結合に由来するピークの比。Note: 1790 cm-1 and 1665 cm-1
Of the infrared absorption spectrum derived from the C = O double bond near 1700 cm-1 and 1665 cm based on
-1 and 1540 cm-1 based on 1600 cm-
Ratio of peaks derived from C = C double bond near 1.

【０００９】（３）１７９０ｃｍ−１と１６６５ｃｍ−
１をベースとした１７４０ｃｍ−１付近のＣ＝Ｏ二重結
合に由来する赤外吸収スペクトルのピークと１６６５ｃ
ｍ−１と１５４０ｃｍ−１をベースとした１６００ｃｍ
−１付近のＣ＝Ｃ二重結合に由来するピークの比が０．
０６以下である熱処理生成物。(3) 1790 cm-1 and 1665 cm-
1665c and an infrared absorption spectrum peak at 1740 cm-1 derived from a C = O double bond and 1665c
1600 cm based on m-1 and 1540 cm-1
The ratio of the peaks derived from the C = C double bond near -1 is 0.
A heat treated product which is less than or equal to 06.

【００１０】（４）実質的に１７７７ｃｍ−１付近のＣ
＝Ｏ二重結合に由来するピークがない熱処理生成物。 以下、本発明を詳細に説明する。まず、本発明における
炭素質原料は石炭乾留時に副生するコールタール又はこ
れより得られるコールタールピッチ、およびこれらの熱
処理生成物、石油系重質油およびそれらを熱処理したも
の、またそれらの水添生成物、それらの熱処理生成物、
及びナフタリン等の低分子化合物を重縮合して得られる
ピッチまたそれらのの熱処理生成物、さらにはこれらを
溶剤で処理して得られた重質成分及びそれらの熱処理生
成物等が含まれる。またさらにはピッチ類、生コークス
等を混合したもの、さらにはカーボンブラック、仮焼コ
ークス等の微粉末、活性炭等を混合したものでも良く、
さらにはそれらを熱処理したものでも良く、通常ディレ
ードコーカー、オートクレーブ等により３５０〜４８０
℃、１〜７２時間程度熱処理することで得られる。(4) C near 1777 cm -1
= A heat-treated product without peaks originating from the O double bond. Hereinafter, the present invention will be described in detail. First, the carbonaceous raw material in the present invention is coal tar by-produced during coal carbonization or coal tar pitch obtained from it, and heat-treated products thereof, petroleum heavy oil and heat-treated products thereof, and hydrogenation thereof. Products, their heat-treated products,
And pitches obtained by polycondensing low molecular weight compounds such as naphthalene and heat-treated products thereof, and heavy components obtained by treating these with a solvent and heat-treated products thereof. Further, a mixture of pitches, raw coke, etc., and further a mixture of carbon black, fine powder such as calcined coke, activated carbon, etc. may be used.
Further, those obtained by heat treatment may be used, and usually 350 to 480 by a delayed coker, autoclave, etc.
It can be obtained by heat treatment at a temperature of 1 to 72 hours.

【００１１】又、該炭素質原料の揮発分（ＶＭ）は４０
重量％を越えたものも使用できるが、４０重量％を越え
ると目標の物性に調整する時間が長く、処理能力が落
ち、コストが高くなるので該原料のＶＭは４０重量％以
下が望ましく、さらには３５％以下が好ましく、最も好
ましくは３０％以下である。The volatile matter (VM) of the carbonaceous raw material is 40
Although the amount exceeding 40% by weight can be used, if the amount exceeds 40% by weight, it takes a long time to adjust to the target physical properties, the processing capacity decreases, and the cost becomes high. Therefore, the VM of the raw material is preferably 40% by weight or less. Is preferably 35% or less, and most preferably 30% or less.

【００１２】またこれらの原料はトルエン可溶分（Ｔ
Ｓ） （γ−レジン量）が高過ぎると低沸点留分が多
く、融着するために熱処理効率が悪いので該原料のγ−
レジン量は４０％以下が望ましく、さらには３５％以下
が好ましく、最も好ましくは３０％以下である。Further, these raw materials are toluene-soluble components (T
S) If the (γ-resin amount) is too high, there are many low-boiling fractions and the heat treatment efficiency is poor due to fusion, so the γ-content of the raw material is
The amount of resin is preferably 40% or less, more preferably 35% or less, and most preferably 30% or less.

【００１３】本発明において、該炭素質原料の熱処理は
通常、２００〜３５０℃、０．５〜４８時間程度で行な
われるが、処理を均一にまた効率良く行うためには機械
的エネルギーを付与した方が良い。機械的エネルギーと
しては撹拌、超音波等が挙げられる。また熱処理は不活
性ガス中（アルゴン、窒素等）、自生圧下で行っても良
いが、空気の存在下でも行われる。In the present invention, the heat treatment of the carbonaceous raw material is usually carried out at 200 to 350 ° C. for about 0.5 to 48 hours, but mechanical energy is applied in order to carry out the treatment uniformly and efficiently. Better. Examples of mechanical energy include stirring and ultrasonic waves. The heat treatment may be carried out in an inert gas (argon, nitrogen, etc.) under autogenous pressure, but also in the presence of air.

【００１４】本発明において目的とする熱処理生成物
は、ＶＭが３％以上、２０重量％以下であって、また平
均粒度が１５〜２０μｍにおけるトルエン可溶分（Ｔ
Ｓ）が１０％以下でかつ１％以上のものである。該熱処
理生成物のＶＭが２０％を超えると焼成時の重量減が大
き過ぎ、特性が低下する、焼成時に割れる等の問題があ
る。また３％未満では燒結性が低下して特性がでない。The heat-treated product intended in the present invention has a VM content of 3% or more and 20% by weight or less and a toluene-soluble component (T) at an average particle size of 15 to 20 μm.
S) is 10% or less and 1% or more. If the VM of the heat-treated product exceeds 20%, there is a problem that the weight loss during firing is too large, the characteristics are deteriorated, and cracking occurs during firing. On the other hand, if it is less than 3%, the sinterability is lowered and the properties are not obtained.

【００１５】また上記の熱処理生成物は、これを粉砕し
て平均粒度が１５〜２０μｍとした時のＴＳ量が１０重
量％以下であり、かつ１重量％以上であるのが好まし
い。ＴＳ量を１０重量％以下とすることにより成形体焼
成時の発泡割れの傾向が低下し、また１重量％以上とす
ることにより燒結性が向上する。The heat-treated product preferably has a TS content of 10% by weight or less and 1% by weight or more when the average particle size is crushed to 15 to 20 μm. When the TS amount is 10% by weight or less, the tendency of foam cracking during firing of the molded article is reduced, and when it is 1% by weight or more, the sinterability is improved.

【００１６】またさらには赤外線吸収スペクトルにおけ
る炭素と酸素の二重結合（Ｃ＝Ｏ）に由来するピークが
ある範囲以下のものが好ましい。すなわち熱処理が進む
と高分子化反応を起こし固化し溶触しなくなり、接着性
が悪くなってくる。特に酸素の存在した状態で熱処理が
進むと不融化反応を生じ、炭素質粉末の燒結性が減少
し、接着しなくなり、生成した炭素材の特性が悪化して
しまうので該炭素質粉末中の酸素量はある範囲以下のも
のが好ましい。すなわち該炭素質粉末中の酸素量が多い
ほど、不融化反応が進んでおり、燒結性が低下するもの
である。また該炭素質粉末中の酸素量が少ないものはそ
れほど不融化は進んでおらず、燒結性は保持しているの
で好ましい。すなわちピッチ等のれき青物の赤外吸収ス
ペクトルにおいて炭素と酸素の二重結合（Ｃ＝Ｏ）に由
来する伸縮振動は１７００、１７４０、１７７７ｃｍ−
１付近にピークが存在するので、炭素と酸素の二重結合
のピークを１７９０ｃｍ−１と１６６５ｃｍ−１をベー
スとした１７００、１７４０、１７７７ｃｍ−１付近の
ピークの高さで示す。ピークの高さはＫＢｒに対するサ
ンプルの濃度で変わるので１６６５ｃｍ−１と１５４０
ｃｍ−１をベースとした１６００ｃｍ−１付近のＣ＝Ｃ
二重結合に由来するピーク高さとの比で炭素と酸素の二
重結合のピークを示すと１７９０ｃｍ−１と１６６５ｃ
ｍ−１をベースとした１７００、１７４０付近の炭素と
酸素の二重結合に由来する赤外吸収スペクトルのピーク
と１６６５ｃｍ−１と１５４０ｃｍ−１をベースとした
１６００ｃｍ−１付近のＣ＝Ｃ二重結合に由来するピー
クの比がそれぞれ０．２５以下、０．０６以下、また１
７７７ｃｍ−１についてはそのピークが存在しない熱処
理生成物が好ましい。Further, those having a peak in the infrared absorption spectrum derived from a double bond (C═O) of carbon and oxygen (C═O) are preferably within the range. That is, as the heat treatment progresses, a polymerizing reaction is caused to solidify and not to be touched, resulting in poor adhesiveness. In particular, when the heat treatment proceeds in the presence of oxygen, an infusibilization reaction occurs, the sinterability of the carbonaceous powder is reduced, the adhesion is lost, and the properties of the carbonaceous material produced deteriorate. The amount is preferably within a certain range. That is, as the amount of oxygen in the carbonaceous powder increases, the infusibilization reaction proceeds and the sinterability decreases. Further, it is preferable that the carbonaceous powder having a small amount of oxygen is not so much infusibilized and retains the sinterability. That is, the stretching vibrations derived from the double bond (C = O) of carbon and oxygen in the infrared absorption spectrum of bituminous substances such as pitch are 1700, 1740 and 1777 cm-.
Since there is a peak in the vicinity of 1, the peaks of the double bond of carbon and oxygen are shown by the heights of the peaks in the vicinity of 1700, 1740 and 1777 cm-1 based on 1790 cm-1 and 1665 cm-1. Since the height of the peak changes depending on the concentration of the sample with respect to KBr, it is 1665 cm-1 and 1540.
C = C around 1600 cm-1 based on cm-1
The peaks of the double bonds of carbon and oxygen are 1790 cm −1 and 1665 c when compared with the peak height derived from the double bonds.
Infrared absorption spectrum peaks derived from the carbon-oxygen double bond near 1700 and 1740 based on m-1 and C = C double around 1600 cm-1 based on 1665 cm-1 and 1540 cm-1. The ratio of peaks derived from binding is 0.25 or less, 0.06 or less, or 1
For 777 cm-1, a heat treated product free of peaks is preferred.

【００１７】また該炭素質原料はそれのみでは発泡して
割れる等の問題があるので、炭素質原料を熱処理して燒
成時に割れないように調整して特性が出現するようにす
る必要があるが、この炭素質原料から熱処理生成物への
炭素と酸素の二重結合の変化率で示すと１７９０ｃｍ−
１と１６６５ｃｍ−１をベースとした１７００ｃｍ−１
付近の炭素と酸素の二重結合に由来する赤外吸収スペク
トルのピークと１６６５ｃｍ−１と１５４０ｃｍ−１を
ベースとした１６００ｃｍ−１付近のＣ＝Ｃ二重結合に
由来するピークの比において、上記熱処理生成物と該炭
素質原料の比が、すなわち炭素質原料から熱処理生成物
への変化率が４．０以下となる条件で熱処理するのが好
ましい。Further, since the carbonaceous raw material has a problem such as foaming and cracking by itself, it is necessary to heat-treat the carbonaceous raw material so that the carbonaceous raw material is not cracked during firing so that the characteristics are exhibited. However, the rate of change of double bond of carbon and oxygen from the carbonaceous raw material to the heat-treated product is 1790 cm −.
1 and 1665 cm-1 based on 1700 cm-1
In the ratio of the peak of the infrared absorption spectrum derived from the double bond of carbon and oxygen in the vicinity and the peak derived from the C = C double bond in the vicinity of 1600 cm-1 based on 1665 cm-1 and 1540 cm-1, It is preferable to perform the heat treatment under the condition that the ratio of the heat treated product to the carbonaceous raw material, that is, the rate of change from the carbonaceous raw material to the heat treated product is 4.0 or less.

【００１８】また該ピークの比はベースの取り方によっ
ても異なるが、１７２５ｃｍ−１と１６６５ｃｍ−１を
ベースとした時は１７００ｃｍ−１のピークは０．２０
以下の熱処理生成物が好ましい。また上記熱処理生成物
と該炭素質原料の比については、すなわち炭素質原料か
ら熱処理生成物への変化率は０．７０以下となる条件で
熱処理するのが好ましい。The ratio of the peaks varies depending on how the base is taken, but when the bases are 1725 cm-1 and 1665 cm-1, the peak at 1700 cm-1 is 0.20.
The following heat treated products are preferred: Regarding the ratio of the heat-treated product to the carbonaceous raw material, that is, the heat treatment is preferably performed under the condition that the rate of change from the carbonaceous raw material to the heat-treated product is 0.70 or less.

【００１９】一般に１７００ｃｍ−１付近のピークはケ
トン基に由来するものであり、１７４０ｃｍ−１付近の
ピークはエステル基に由来するものであり、また１７７
７ｃｍ−１付近のピークはラクトン類に由来するもので
あるといわれており、不融化反応の進展とともに１７０
０、次いで１７４０、さらには１７７７ｃｍ−１付近の
ピークが増加してくる。これらの酸素結合はそれぞれあ
る範囲以下のものが望ましい。Generally, the peak around 1700 cm -1 is derived from a ketone group, the peak around 1740 cm -1 is derived from an ester group, and 177
The peak around 7 cm-1 is said to be derived from lactones, and is 170% as the infusible reaction progresses.
The peak near 0, then 1740, and further around 1777 cm −1 increases. It is desirable that each of these oxygen bonds be within a certain range.

【００２０】またこれらの該熱処理生成物は一種でも使
用できるが、二種類以上のものを混合して使用すること
もできる。これらの熱処理生成物は常法に従い、微粉砕
して原料粉を得ることができる。良好な成形品を得るた
めには原料粉の平均粒度は１００μｍ以下が望ましい
が、製品の均一性をさらに向上させるためには好ましく
は５０μｍ以下、さらに好ましくは３０μｍ以下、最も
好ましくは２０μｍ以下に微粉砕するのが望ましい。These heat-treated products may be used alone or in combination of two or more. These heat-treated products can be finely pulverized to obtain a raw material powder according to a conventional method. The average particle size of the raw material powder is preferably 100 μm or less in order to obtain a good molded product, but in order to further improve the uniformity of the product, it is preferably 50 μm or less, more preferably 30 μm or less, and most preferably 20 μm or less. It is desirable to grind.

【００２１】特殊炭素材を製造するための成形は通常の
モールド成形、冷間等方圧成形等が用いられる。また燒
成は不活性ガス中、コークスブリーズ中いずれでも可能
であり、８００〜１０００℃の温度でなされる。さらに
黒鉛化はタンマン炉、アチソン炉、誘導加熱等の常法が
使用でき、通常２０００〜３０００℃でなされる。As the molding for producing the special carbon material, ordinary molding, cold isostatic molding or the like is used. Sintering can be performed in an inert gas or in a coke breeze, and is performed at a temperature of 800 to 1000 ° C. Further, graphitization can be carried out by a conventional method such as a Tammann furnace, an Acheson furnace, an induction heating, etc., and usually at 2000 to 3000 ° C.

【００２２】[0022]

【実施例】以下、実施例により本発明をさらに詳細に説
明する。The present invention will be described in more detail with reference to the following examples.

【実施例１】コールタールピッチをディレードコーカー
で熱処理して得たＶＭが２０．５％で、かつγレジン量
が２４．４％の炭素質原料を空気の存在下で熱処理を行
なった。熱処理生成物のＶＭは１３．６％であり、γレ
ジン量は５．１％であった。また生成物の赤外吸収スペ
クトルの１７９０ｃｍ−１と１６６５ｃｍ−１をベース
とした１７００ｃｍ−１付近のピークと１６６５ｃｍ−
１と１５４０ｃｍ−１をベースとした１６００ｃｍ−１
付近のピークの比は０．０８であった。Example 1 A carbonaceous raw material having a VM of 20.5% and a γ-resin amount of 24.4% obtained by heat-treating coal tar pitch in a delayed coker was heat-treated in the presence of air. The VM of the heat-treated product was 13.6%, and the amount of γ resin was 5.1%. Further, the infrared absorption spectrum of the product has a peak at around 1700 cm-1 based on 1790 cm-1 and 1665 cm-1, and 1665 cm-
1600cm-1 based on 1 and 1540cm-1
The ratio of peaks in the vicinity was 0.08.

【００２３】この生成物を微粉砕して、平均粒度を１６
μｍとしたものをモールドプレスにて成形して成形体を
得た。この生成形体をコークスブリーズ中１０００℃ま
で燒成後、タンマン炉で２８００℃まで黒鉛化して成形
体を得た。該黒鉛成形体の嵩密度は１．９３であり、放
電加工時の消耗率は０．８％であった。The product is milled to an average particle size of 16
What was made into μm was molded by a mold press to obtain a molded body. This green body was calcined in coke breeze to 1000 ° C., and then graphitized to 2800 ° C. in a Tammann furnace to obtain a molded body. The bulk density of the graphite compact was 1.93, and the wear rate during electric discharge machining was 0.8%.

【００２４】[0024]

【実施例２】実施例１と同じ炭素質原料を空気の存在下
で熱処理を行ない、ＶＭが１３．４％であり、γレジン
量は５．０％である熱処理生成物を得た。この生成物の
赤外吸収スペクトルの１７９０ｃｍ−１と１６６５ｃｍ
−１をベースとした１７００ｃｍ−１付近のピークと１
６６５ｃｍ−１と１５４０ｃｍ−１をベースとした１６
００ｃｍ−１付近のピークの比において、熱処理生成物
と該炭素質原料とのピークの比は１．５４であった。Example 2 The same carbonaceous raw material as in Example 1 was heat treated in the presence of air to obtain a heat treated product having a VM of 13.4% and a γ resin content of 5.0%. 1790 cm-1 and 1665 cm of the infrared absorption spectrum of this product
-1 based peak and 1 near 1700 cm-1
16 based on 665 cm-1 and 1540 cm-1
In the peak ratio near 00 cm-1, the peak ratio of the heat treatment product and the carbonaceous raw material was 1.54.

【００２５】この生成物を微粉砕して、平均粒度を１６
μｍとしたものをモールドプレスにて成形して成形体を
得た。この生成形体をコークスブリーズ中１０００℃ま
で焼成後、タンマン炉で２８００℃まで黒鉛化して成形
体を得た。該黒鉛成形体の嵩密度は１．９３であり、放
電加工時の消耗率は０．８％であった。The product is finely ground to an average particle size of 16
What was made into μm was molded by a mold press to obtain a molded body. This green body was fired in coke breeze to 1000 ° C., and then graphitized to 2800 ° C. in a Tammann furnace to obtain a molded body. The bulk density of the graphite compact was 1.93, and the wear rate during electric discharge machining was 0.8%.

【実施例３】実施例１と同じ炭素質原料を空気の存在下
で熱処理を行ない、ＶＭが１３．８％であり、γレジン
量は５．３％である熱処理生成物を得た。Example 3 The same carbonaceous raw material as in Example 1 was heat treated in the presence of air to obtain a heat treated product having a VM of 13.8% and a γ resin content of 5.3%.

【００２６】この生成物の赤外吸収スペクトルの１７９
０ｃｍ−１と１６６５ｃｍ−１をベースとした１７４０
ｃｍ−１付近のピークと１６６５ｃｍ−１と１５４０ｃ
ｍ−１をベースとした１６００ｃｍ−１付近のピークの
比は０．０であった。179 of the infrared absorption spectrum of this product
1740 based on 0 cm-1 and 1665 cm-1
peak around cm-1 and 1665 cm-1 and 1540c
The ratio of peaks near 1600 cm-1 based on m-1 was 0.0.

【００２７】この生成物を微粉砕して、平均粒度を１６
μｍとしたものをモールドプレスにて成形して成形体を
得た。この生成形体をコークスブリーズ中１０００℃ま
で焼成後、タンマン炉で２８００℃まで黒鉛化して成形
体を得た。この生成物を微粉砕して、平均粒度を１６μ
ｍとしたものをモールドプレスにて成形して成形体を得
た。この生成形体をコークスブリーズ中１０００℃まで
焼成後、タンマン炉で２８００℃まで黒鉛化して成形体
を得た。The product was pulverized to an average particle size of 16
What was made into μm was molded by a mold press to obtain a molded body. This green body was fired in coke breeze to 1000 ° C., and then graphitized to 2800 ° C. in a Tammann furnace to obtain a molded body. The product is pulverized to an average particle size of 16μ
m was molded by a mold press to obtain a molded body. This green body was fired in coke breeze to 1000 ° C., and then graphitized to 2800 ° C. in a Tammann furnace to obtain a molded body.

【００２８】該黒鉛成形体の嵩密度は１．９３であり、
放電加工時の消耗率は０．８％であった。The bulk density of the graphite molded body is 1.93,
The wear rate during electric discharge machining was 0.8%.

【実施例４】実施例１と同じ炭素質原料を空気の存在下
で熱処理を行ない、ＶＭが１３．９％であり、γレジン
量は５．２％である熱処理生成物を得た。Example 4 The same carbonaceous raw material as in Example 1 was heat-treated in the presence of air to obtain a heat-treated product having a VM of 13.9% and a γ-resin amount of 5.2%.

【００２９】この生成物の赤外吸収スペクトルの１７９
０ｃｍ−１と１６６５ｃｍ−１をベースとした１７７７
ｃｍ−１付近のピークは検出されなかった。この生成物
を微粉砕して、平均粒度を１６μｍとしたものをモール
ドプレスにて成形して成形体を得た。この生成形体をコ
ークスブリーズ中１０００℃まで焼成後、タンマン炉で
２８００℃まで黒鉛化して成形体を得た。179 of the infrared absorption spectrum of this product
1777 based on 0 cm-1 and 1665 cm-1
No peak near cm-1 was detected. This product was finely pulverized, and a product having an average particle size of 16 μm was molded by a mold press to obtain a molded product. This green body was fired in coke breeze to 1000 ° C., and then graphitized to 2800 ° C. in a Tammann furnace to obtain a molded body.

【００３０】該黒鉛成形体の嵩密度は１．９３であり、
放電加工時の消耗率は０．８％であった。The bulk density of the molded graphite was 1.93,
The wear rate during electric discharge machining was 0.8%.

【実施例５】コールタールピッチをディレードコーカー
で熱処理して得たＶＭが２０．６％で、かつγレジン量
が２１．１％の炭素質原料を空気の存在下で熱処理を行
なった。熱処理生成物のＶＭは１３．５％であり、γレ
ジン量は４．５％であった。また生成物の赤外吸収スペ
クトルの１７９０ｃｍ−１と１６６５ｃｍ−１をベース
とした１７００ｃｍ−１付近のピークと１６６５ｃｍ−
１と１５４０ｃｍ−１をベースとした１６００ｃｍ−１
付近のピークの比は０．１２であった。Example 5 A carbonaceous raw material having a VM of 20.6% and a γ-resin amount of 21.1% obtained by heat-treating coal tar pitch with a delayed coker was heat-treated in the presence of air. The VM of the heat-treated product was 13.5% and the amount of γ-resin was 4.5%. Further, the infrared absorption spectrum of the product has a peak at around 1700 cm-1 based on 1790 cm-1 and 1665 cm-1, and 1665 cm-
1600cm-1 based on 1 and 1540cm-1
The ratio of peaks in the vicinity was 0.12.

【００３１】この生成物を微粉砕して、平均粒度を１６
μｍとしたものをモールドプレスにて成形して成形体を
得た。この生成形体をコークスブリーズ中１０００℃ま
で燒成後、タンマン炉で２８００℃まで黒鉛化して成形
体を得た。該黒鉛成形体の嵩密度は１．９３であり、放
電加工時の消耗率は０．５％であった。The product was finely ground to an average particle size of 16
What was made into μm was molded by a mold press to obtain a molded body. This green body was calcined in coke breeze to 1000 ° C., and then graphitized to 2800 ° C. in a Tammann furnace to obtain a molded body. The bulk density of the graphite compact was 1.93, and the wear rate during electric discharge machining was 0.5%.

【００３２】[0032]

【実施例６】実施例５と同じ炭素質原料を空気の存在下
で熱処理を行ない、ＶＭが１３．７％であり、γレジン
量は４．６％である熱処理生成物を得た。この生成物の
赤外吸収スペクトルの１７９０ｃｍ−１と１６６５ｃｍ
−１をベースとした１７００ｃｍ−１付近のピークと１
６６５ｃｍ−１と１５４０ｃｍ−１をベースとした１６
００ｃｍ−１付近のピークの比において、熱処理生成物
と該炭素質原料とのピークの比は２．２５であった。Example 6 The same carbonaceous raw material as in Example 5 was heat-treated in the presence of air to obtain a heat-treated product having a VM of 13.7% and a γ-resin amount of 4.6%. 1790 cm-1 and 1665 cm of the infrared absorption spectrum of this product
-1 based peak and 1 near 1700 cm-1
16 based on 665 cm-1 and 1540 cm-1
In the peak ratio near 00 cm-1, the peak ratio between the heat treatment product and the carbonaceous raw material was 2.25.

【００３３】この生成物を微粉砕して、平均粒度を１６
μｍとしたものをモールドプレスにて成形して成形体を
得た。この生成形体をコークスブリーズ中１０００℃ま
で燒成後、タンマン炉で２８００℃まで黒鉛化して成形
体を得た。該黒鉛成形体の嵩密度は１．９３であり、放
電加工時の消耗率は０．５％であった。The product is finely ground to an average particle size of 16
What was made into μm was molded by a mold press to obtain a molded body. This green body was calcined in coke breeze to 1000 ° C., and then graphitized to 2800 ° C. in a Tammann furnace to obtain a molded body. The bulk density of the graphite compact was 1.93, and the wear rate during electric discharge machining was 0.5%.

【実施例７】実施例５と同じ炭素質原料を空気の存在下
で熱処理を行ない、ＶＭが１３．９％であり、γレジン
量は５．４％である熱処理生成物を得た。Example 7 The same carbonaceous raw material as in Example 5 was heat treated in the presence of air to obtain a heat treated product having a VM of 13.9% and a γ resin content of 5.4%.

【００３４】この生成物の赤外吸収スペクトルの１７９
０ｃｍ−１と１６６５ｃｍ−１をベースとした１７４０
ｃｍ−１付近のピークと１６６５ｃｍ−１と１５４０ｃ
ｍ−１をベースとした１６００ｃｍ−１付近のピークの
比は０．０であった。179 of the infrared absorption spectrum of this product
1740 based on 0 cm-1 and 1665 cm-1
peak around cm-1 and 1665 cm-1 and 1540c
The ratio of peaks near 1600 cm-1 based on m-1 was 0.0.

【００３５】この生成物を微粉砕して、平均粒度を１６
μｍとしたものをモールドプレスにて成形して成形体を
得た。この生成形体をコークスブリーズ中１０００℃ま
で燒成後、タンマン炉で２８００℃まで黒鉛化して成形
体を得た。該黒鉛成形体の嵩密度は１．９３であり、放
電加工時の消耗率は０．５％であった。The product was finely ground to an average particle size of 16
What was made into μm was molded by a mold press to obtain a molded body. This green body was calcined in coke breeze to 1000 ° C., and then graphitized to 2800 ° C. in a Tammann furnace to obtain a molded body. The bulk density of the graphite compact was 1.93, and the wear rate during electric discharge machining was 0.5%.

【実施例８】実施例５と同じ炭素質原料を空気の存在下
で熱処理を行ない、ＶＭが１３．４％であり、γレジン
量は４．７％である熱処理生成物を得た。Example 8 The same carbonaceous raw material as in Example 5 was heat-treated in the presence of air to obtain a heat-treated product having a VM of 13.4% and a γ-resin amount of 4.7%.

【００３６】この生成物の赤外吸収スペクトルの１７７
７ｃｍ−１付近のピークは検出されなかった。この生成
物を微粉砕して、平均粒度を１６μｍとしたものをモー
ルドプレスにて成形して成形体を得た。この生成形体を
コークスブリーズ中１０００℃まで燒成後、タンマン炉
で２８００℃まで黒鉛化して成形体を得た。177 of the infrared absorption spectrum of this product
No peak near 7 cm-1 was detected. This product was finely pulverized, and a product having an average particle size of 16 μm was molded by a mold press to obtain a molded product. This green body was calcined in coke breeze to 1000 ° C., and then graphitized to 2800 ° C. in a Tammann furnace to obtain a molded body.

【００３７】該黒鉛成形体の嵩密度は１．９３であり、
放電加工時の消耗率は０．５％であった。The bulk density of the graphite compact was 1.93,
The wear rate during electric discharge machining was 0.5%.

【比較例１】実施例１と同じ炭素質原料を空気の存在下
で熱処理を行ない、ＶＭが１４．４％であり、γレジン
量は６．０の熱処理生成物を得た。この生成物の赤外吸
収スペクトルの１７９０ｃｍ−１と１６６５ｃｍ−１を
ベースとした１７００ｃｍ−１付近のピークと１６６５
ｃｍ−１と１５４０ｃｍ−１をベースとした１６００ｃ
ｍ−１付近のピークの比は０．２８であった。Comparative Example 1 The same carbonaceous raw material as in Example 1 was heat treated in the presence of air to obtain a heat treated product having a VM of 14.4% and a γ resin content of 6.0. Infrared absorption spectrum of this product was based on 1790 cm −1 and 1665 cm −1, with a peak around 1700 cm −1 and 1665 cm −1.
1600c based on cm-1 and 1540cm-1
The ratio of peaks near m-1 was 0.28.

【００３８】この生成物を微粉砕して、平均粒度を１７
μｍとしたものをモールドプレスにて成形して成形体を
得た。この生成形体をコークスブリーズ中１０００℃ま
で燒成後、タンマン炉で２８００℃まで黒鉛化して成形
体を得た。該黒鉛成形体の嵩密度は１．７７であり、放
電加工時の消耗率は３．５％であった。The product was milled to an average particle size of 17
What was made into μm was molded by a mold press to obtain a molded body. This green body was calcined in coke breeze to 1000 ° C., and then graphitized to 2800 ° C. in a Tammann furnace to obtain a molded body. The graphite compact had a bulk density of 1.77 and a wear rate during electric discharge machining of 3.5%.

【比較例２】実施例１と同じ炭素質原料を空気の存在下
で熱処理を行ない、ＶＭが１４．２％であり、γレジン
量は５．９％である熱処理生成物を得た。Comparative Example 2 The same carbonaceous raw material as in Example 1 was heat treated in the presence of air to obtain a heat treated product having a VM of 14.2% and a γ resin amount of 5.9%.

【００３９】この生成物の赤外吸収スペクトルの１７９
０ｃｍ−１と１６６５ｃｍ−１をベースとした１７００
ｃｍ−１付近のピークと１６６５ｃｍ−１と１５４０ｃ
ｍ−１をベースとした１６００ｃｍ−１付近のピークの
比において、熱処理生成物と該炭素質原料とのピークの
比は５．０４であった。この生成物を微粉砕して、平均
粒度を１７μｍとしたものをモールドプレスにて成形し
て成形体を得た。この生成形体をコークスブリーズ中１
０００℃まで燒成後、タンマン炉で２８００℃まで黒鉛
化して成形体を得た。179 of the infrared absorption spectrum of this product
1700 based on 0 cm-1 and 1665 cm-1
peak around cm-1 and 1665 cm-1 and 1540c
In the peak ratio around 1600 cm-1 based on m-1, the peak ratio between the heat treatment product and the carbonaceous raw material was 5.04. This product was finely pulverized, and the one having an average particle size of 17 μm was molded by a mold press to obtain a molded body. 1 in Coke Breeze
After sintering to 000 ° C., it was graphitized to 2800 ° C. in a Tammann furnace to obtain a molded body.

【００４０】該黒鉛成形体の嵩密度は１．７７であり、
放電加工時の消耗率は３．５％であった。The bulk density of the molded graphite was 1.77,
The wear rate during electric discharge machining was 3.5%.

【比較例３】実施例１と同じ炭素質原料を空気の存在下
で熱処理を行ない、ＶＭが１４．４％であり、γレジン
量は６．１％である熱処理生成物を得た。Comparative Example 3 The same carbonaceous raw material as in Example 1 was heat treated in the presence of air to obtain a heat treated product having a VM of 14.4% and a γ resin content of 6.1%.

【００４１】この生成物の赤外吸収スペクトルの１７９
０ｃｍ−１と１６６５ｃｍ−１をベースとした１７４０
ｃｍ−１付近のピークと１６６５ｃｍ−１と１５４０ｃ
ｍ−１をベースとした１６００ｃｍ−１付近のピークの
比は０．０８であった。179 of the infrared absorption spectrum of this product
1740 based on 0 cm-1 and 1665 cm-1
peak around cm-1 and 1665 cm-1 and 1540c
The ratio of peaks near 1600 cm-1 based on m-1 was 0.08.

【００４２】この生成物を微粉砕して、平均粒度を１７
μｍとしたものをモールドプレスにて成形して成形体を
得た。この生成形体をコークスブリーズ中１０００℃ま
で燒成後、タンマン炉で２８００℃まで黒鉛化して成形
体を得た。該黒鉛成形体の嵩密度は１．７７であり、放
電加工時の消耗率は３．５％であった。The product was finely ground to an average particle size of 17
What was made into μm was molded by a mold press to obtain a molded body. This green body was calcined in coke breeze to 1000 ° C., and then graphitized to 2800 ° C. in a Tammann furnace to obtain a molded body. The graphite compact had a bulk density of 1.77 and a wear rate during electric discharge machining of 3.5%.

【００４３】[0043]

【比較例４】実施例１と同じ炭素質原料を空気の存在下
で熱処理を行ない、ＶＭが１４．６％であり、γレジン
量は６．２％である熱処理生成物を得た。この生成物の
赤外吸収スペクトルの１７９０ｃｍ−１と１６６５ｃｍ
−１をベースとした１７７７ｃｍ−１付近のピークと１
６６５ｃｍ−１と１５４０ｃｍ−１をベースとした１６
００ｃｍ−１付近のピークの比は０．０２であった。Comparative Example 4 The same carbonaceous raw material as in Example 1 was heat-treated in the presence of air to obtain a heat-treated product having a VM of 14.6% and a γ-resin amount of 6.2%. 1790 cm-1 and 1665 cm of the infrared absorption spectrum of this product
-1 and the peak around 1777cm-1 and 1
16 based on 665 cm-1 and 1540 cm-1
The ratio of peaks near 00 cm-1 was 0.02.

【００４４】この生成物を微粉砕して、平均粒度を１７
μｍとしたものをモールドプレスにて成形して成形体を
得た。この生成形体をコークスブリーズ中１０００℃ま
で燒成後、タンマン炉で２８００℃まで黒鉛化して成形
体を得た。該黒鉛成形体の嵩密度は１．７７であり、放
電加工時の消耗率は３．５％であった。The product was milled to an average particle size of 17
What was made into μm was molded by a mold press to obtain a molded body. This green body was calcined in coke breeze to 1000 ° C., and then graphitized to 2800 ° C. in a Tammann furnace to obtain a molded body. The graphite compact had a bulk density of 1.77 and a wear rate during electric discharge machining of 3.5%.

【比較例５】実施例５と同じ炭素質原料を空気の存在下
で熱処理を行ない、ＶＭが１４．４％であり、γレジン
量は７．４％の熱処理生成物を得た。Comparative Example 5 The same carbonaceous raw material as in Example 5 was heat-treated in the presence of air to obtain a heat-treated product having a VM of 14.4% and a γ resin content of 7.4%.

【００４５】この生成物の赤外吸収スペクトルの１７９
０ｃｍ−１と１６６５ｃｍ−１をベースとした１７００
ｃｍ−１付近のピークと１６６５ｃｍ−１と１５４０ｃ
ｍ−１をベースとした１６００ｃｍ−１付近のピークの
比は０．３５であった。179 of the infrared absorption spectrum of this product
1700 based on 0 cm-1 and 1665 cm-1
peak around cm-1 and 1665 cm-1 and 1540c
The ratio of peaks near 1600 cm-1 based on m-1 was 0.35.

【００４６】この生成物を微粉砕して、平均粒度を１８
μｍとしたものをモールドプレスにて成形して成形体を
得た。この生成形体をコークスブリーズ中１０００℃ま
で燒成後、タンマン炉で２８００℃まで黒鉛化して成形
体を得た。該黒鉛成形体の嵩密度は１．７９であり、放
電加工時の消耗率は９．７％であった。The product was milled to an average particle size of 18
What was made into μm was molded by a mold press to obtain a molded body. This green body was calcined in coke breeze to 1000 ° C., and then graphitized to 2800 ° C. in a Tammann furnace to obtain a molded body. The bulk density of the graphite compact was 1.79, and the wear rate during electric discharge machining was 9.7%.

【００４７】[0047]

【比較例６】実施例５と同じ炭素質原料を空気の存在下
で熱処理を行ない、ＶＭが１４．６％であり、γレジン
量は７．５％である熱処理生成物を得た。この生成物の
赤外吸収スペクトルの１７９０ｃｍ−１と１６６５ｃｍ
−１をベースとした１７００ｃｍ−１付近のピークと１
６６５ｃｍ−１と１５４０ｃｍ−１をベースとした１６
００ｃｍ−１付近のピークの比において、熱処理生成物
と該炭素質原料とのピークの比は６．１１であった。Comparative Example 6 The same carbonaceous raw material as in Example 5 was heat-treated in the presence of air to obtain a heat-treated product having a VM of 14.6% and a γ-resin amount of 7.5%. 1790 cm-1 and 1665 cm of the infrared absorption spectrum of this product
-1 based peak and 1 near 1700 cm-1
16 based on 665 cm-1 and 1540 cm-1
In the peak ratio near 00 cm-1, the peak ratio between the heat treatment product and the carbonaceous raw material was 6.11.

【００４８】この生成物を微粉砕して、平均粒度を１８
μｍとしたものをモールドプレスにて成形して成形体を
得た。この生成形体をコークスブリーズ中１０００℃ま
で燒成後、タンマン炉で２８００℃まで黒鉛化して成形
体を得た。該黒鉛成形体の嵩密度は１．７９であり、放
電加工時の消耗率は９．７％であった。The product was milled to an average particle size of 18
What was made into μm was molded by a mold press to obtain a molded body. This green body was calcined in coke breeze to 1000 ° C., and then graphitized to 2800 ° C. in a Tammann furnace to obtain a molded body. The bulk density of the graphite compact was 1.79, and the wear rate during electric discharge machining was 9.7%.

【００４９】[0049]

【比較例７】実施例５と同じ炭素質原料を空気の存在下
で熱処理を行ない、ＶＭが１４．２％であり、γレジン
量は７．１％である熱処理生成物を得た。この生成物の
赤外吸収スペクトルの１７９０ｃｍ−１と１６６５ｃｍ
−１をベースとした１７４０ｃｍ−１付近のピークと１
６６５ｃｍ−１と１５４０ｃｍ−１をベースとした１６
００ｃｍ−１付近のピークの比は０．０７であった。Comparative Example 7 The same carbonaceous raw material as in Example 5 was heat-treated in the presence of air to obtain a heat-treated product having a VM of 14.2% and a γ-resin amount of 7.1%. 1790 cm-1 and 1665 cm of the infrared absorption spectrum of this product
-1 based peak and 1 at around 1740 cm-1
16 based on 665 cm-1 and 1540 cm-1
The ratio of peaks near 00 cm-1 was 0.07.

【００５０】この生成物を微粉砕して、平均粒度を１８
μｍとしたものをモールドプレスにて成形して成形体を
得た。この生成形体をコークスブリーズ中１０００℃ま
で燒成後、タンマン炉で２８００℃まで黒鉛化して成形
体を得た。該黒鉛成形体の嵩密度は１．７９であり、放
電加工時の消耗率は９．７％であった。The product was finely ground to an average particle size of 18
What was made into μm was molded by a mold press to obtain a molded body. This green body was calcined in coke breeze to 1000 ° C., and then graphitized to 2800 ° C. in a Tammann furnace to obtain a molded body. The bulk density of the graphite compact was 1.79, and the wear rate during electric discharge machining was 9.7%.

【００５１】[0051]

【比較例８】実施例５と同じ炭素質原料を空気の存在下
で熱処理を行ない、ＶＭが１４．２％であり、γレジン
量は６．１％である熱処理生成物を得た。この生成物の
赤外吸収スペクトルの１７９０ｃｍ−１と１６６５ｃｍ
−１をベースとした１７７７ｃｍ−１付近のピークと１
６６５ｃｍ−１と１５４０ｃｍ−１をベースとした１６
００ｃｍ−１付近のピークの比は０．０４であった。Comparative Example 8 The same carbonaceous raw material as in Example 5 was heat-treated in the presence of air to obtain a heat-treated product having a VM of 14.2% and a γ-resin amount of 6.1%. 1790 cm-1 and 1665 cm of the infrared absorption spectrum of this product
-1 and the peak around 1777cm-1 and 1
16 based on 665 cm-1 and 1540 cm-1
The ratio of peaks near 00 cm-1 was 0.04.

【００５２】この生成物を微粉砕して、平均粒度を１８
μｍとしたものをモールドプレスにて成形して成形体を
得た。この生成形体をコークスブリーズ中１０００℃ま
で燒成後、タンマン炉で２８００℃まで黒鉛化して成形
体を得た。該黒鉛成形体の嵩密度は１．７９であり、放
電加工時の消耗率は９．７％であった。The product was milled to an average particle size of 18
What was made into μm was molded by a mold press to obtain a molded body. This green body was calcined in coke breeze to 1000 ° C., and then graphitized to 2800 ° C. in a Tammann furnace to obtain a molded body. The bulk density of the graphite compact was 1.79, and the wear rate during electric discharge machining was 9.7%.

【００５３】[0053]

【比較例９】市販の放電加工用特殊炭素材（黒鉛成形
体）の嵩密度、放電加工時の消耗率はそれぞれ１．８
４、４．４％であった。[Comparative Example 9] The bulk density and the wear rate during electric discharge machining of the commercially available special carbon material for electric discharge machining (graphite compact) were 1.8.
It was 4, 4.4%.

【発明の効果】以上述べたように本発明による原料粉を
用いて製造した炭素材は従来方法による炭素材よりも嵩
密度が高く、放電加工時の消耗率が低い等放電加工特性
が良好となり、また従来方法に比べて混合、ねつ合の工
程が省略でき、コストも低減できるものである。As described above, the carbon material produced by using the raw material powder according to the present invention has a higher bulk density than the carbon material according to the conventional method and has a low wear rate during electric discharge machining, resulting in favorable electric discharge machining characteristics. In addition, as compared with the conventional method, the steps of mixing and mating can be omitted, and the cost can be reduced.

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 炭素質原料を熱処理して得られる生成
物であり、揮発分が２０重量％以下で３重量％以上であ
り、かつ平均粒度が１５〜２０μｍにおけるトルエン可
溶分が１０重量％以下で１重量％以上である熱処理生成
物のうち、赤外吸収スペクトルの炭素と酸素の二重結合
（Ｃ＝Ｏ）の伸縮振動に由来する下記に示す条件（１）
ないし（４）の少なくとも一つを満足するものを微粉砕
することを特徴とする炭素材用原料粉の製造方法。 （１）１７９０ｃｍ−１と１６６５ｃｍ−１をベースと
した１７００ｃｍ−１付近のＣ＝Ｏ二重結合に由来する
赤外吸収スペクトルのピークと１６６５Ｃｍ−１と１５
４０ｃｍ−１をベースとした１６００ｃｍ−１付近のＣ
＝Ｃ二重結合に由来するピークの比が０．２５以下であ
る熱処理生成物。 （２）下記に示す赤外吸収スペクトルの比における上記
熱処理生成物と該炭素質原料の比が、すなわち炭素質原
料から熱処理生成物への変化率が４．０以下である熱処
理生成物。 記；１７９０ｃｍ−１と１６６５ｃｍ−１をベースとし
た１７００ｃｍ−１付近のＣ＝Ｏ二重結合に由来する赤
外吸収スペクトルのピークと１６６５ｃｍ−１と１５４
０ｃｍ−１をベースとした１６００ｃｍ−１付近のＣ＝
Ｃ二重結合に由来するピークの比。 （３）１７９０ｃｍ−１と１６６５ｃｍ−１をベースと
した１７４０ｃｍ−１付近のＣ＝Ｃ二重結合に由来する
赤外吸収スペクトルのピークと１６６５ｃｍ−１と１５
４０ｃｍ−１をベースとした１６００ｃｍ−１付近のＣ
＝Ｃ二重結合に由来するピークの比が０．０６以下であ
る熱処理生成物。 （４）実質的に１７７７ｃｍ−１付近のＣ＝Ｏ二重結合
に由来するピークがない熱処理生成物。1. A product obtained by heat-treating a carbonaceous raw material, which has a volatile content of 20% by weight or less and 3% by weight or more, and a toluene-soluble content of 10% by weight at an average particle size of 15 to 20 μm. The condition (1) shown below, which is derived from the stretching vibration of the carbon-oxygen double bond (C = O) in the infrared absorption spectrum of the heat-treated product of 1% by weight or more below.
To a method of manufacturing a raw material powder for a carbon material, characterized in that the material satisfying at least one of (4) to (4) is pulverized. (1) The peak of the infrared absorption spectrum derived from the C = O double bond near 1700 cm-1 based on 1790 cm-1 and 1665 cm-1 and 1665 Cm-1 and 15
C around 1600 cm-1 based on 40 cm-1
= A heat-treated product having a ratio of peaks derived from a C double bond of 0.25 or less. (2) A heat treatment product in which the ratio of the heat treatment product to the carbonaceous raw material in the ratio of the infrared absorption spectrum shown below, that is, the rate of change from the carbonaceous raw material to the heat treatment product is 4.0 or less. Note: Infrared absorption spectrum peak derived from C = O double bond near 1700 cm-1 and 1665 cm-1 and 154 based on 1790 cm-1 and 1665 cm-1.
C = around 1600 cm-1 based on 0 cm-1
Ratio of peaks derived from C double bonds. (3) Infrared absorption spectrum peak derived from C = C double bond near 1740 cm-1 and 1665 cm-1 and 15 based on 1790 cm-1 and 1665 cm-1.
C around 1600 cm-1 based on 40 cm-1
= A heat-treated product having a ratio of peaks derived from a C double bond of 0.06 or less. (4) A heat-treated product having substantially no peak derived from a C═O double bond near 1777 cm −1.